A Sensitive Visible Spectrophotometric Method for Copper Using Bis-Substituted Thiocarbamoyl Trisulfides
- 1 August 1969
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 2 (8) , 439-448
- https://doi.org/10.1080/00032716908055293
Abstract
Bis-substituted thiocarbamoyl disulfides (thiuram disulfides) were investigated as chromogenic reagents for the analysis of copper in trichloroacetic acid solutions. It was found that hydrogen peroxide speeded color development, increased color stability and enhanced color intensity in a trichloroacetic acid-alcohol matrix. In the presence of hydrogen peroxide, all copper complexes had molar absorptivities exceeding 30,000. Bis-pentamethylene thiocarbamoyl disulfide was selected as the best commerically available reagent of those investigated. The procedure is almost interference free, silver and mercury being the most serious interference. The sensitivity is 6 × 10−3 micrograms/cm2.Keywords
This publication has 3 references indexed in Scilit:
- Bis-(2,6-dimethylmorpholin)-thiuramdisulfid als reagens für die photometrische extraktionsbestimmung kleiner kupfergehalte und von kupferspuren in biologischem materialAnalytica Chimica Acta, 1966
- Dimorpholinthiuramdisulfid als Reagens in der AnalytikMicrochimica Acta, 1963
- The Reaction of Carbon Disulfide with Amine SulfidesJournal of the American Chemical Society, 1943